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We've
always intuitively felt that a cat somehow knows when we're not
feeling well and even where it hurts. Got a headache and a cat just
seems to wrap around your head. A stomach ache and a cat can't seem
to get off your abdomen. And purrs and purrs and purrs! It was always
believed that a cat's purr was relaxing or stress reducing and that
that led to any number of healthful benefits. While that may be
so, science has shown that the cat's purr is much more than just
relaxing. Remember that it's not just the sound of purring that's
important but more the tremor or vibration it produces.
A Cat's Nine Lives
Interestingly,
science has known for many years that vibrations at specific levels
or frequencies cause healing changes in the body. They can, for
example, induce bone growth and regeneration. Bone fractures heal
faster and weakened bones begin to strengthen and rebuild. Also,
in the higher frequency ranges, the production of the body's own
natural anti-inflammatory compounds increases thereby reducing joint
pain and swelling. There is further evidence of muscle, tendon and
ligament repair within these frequency ranges as well, which has
led to some popularity in sports medicine and gyms around the world,
especially in the former Soviet Union where so much of this research
was conducted. It was also known through various veterinary studies,
such as the one reported in The Journal of the American Veterinary
Medicine Association for example (J Am Vet Med Assoc 99; 214(9):
1336-41), that cats rarely suffer bone or joint related diseases,
including hip dysplasia, arthritis and ligament problems. Even bone
cancers, such as myeloma or osteosarcoma, are almost unheard of
in cats.
But
it took researcher Elizabeth von Muggenthaler of the Fauna Communications
Research Institute in North Carolina (FCRI), a specialist in the
field of bioacoustics, to put it all together. Bioacoustics is the
study of the frequency, pitch, loudness, and duration of animal
sounds as it relates to the animal's behavior. Based on her research,
she proposes that nature has endowed all kinds of felines with an
evolutionary healing advantage in the simple act of purring. Remember
that purring takes energy and cats purr not only when all is well,
but also when the cat is giving birth, hurt or just scared. There
has to be a very good reason for the energy expenditure to produce
purring, especially when the cat is physically stressed or ill.
It would have to be somehow involved in its survival, and Muggenthaler
set out to find how.
The Science Behind the Purr
She recorded
and then measured the purr of forty-four felids (members of the
cat family) including cheetahs, ocelots, pumas, domestic cats, and
servals. Cats, from your house pet to lions and tigers in the wild,
generally purr in the range of 20 to 140 Hertz (Hz). Some are as
high as 150 Hz but the average housecat comes in at about 25 and
50 Hz.
Research
has already shown that exposure to frequencies at that same 20 and
50 Hz level induces increased bone density. In one study, for example,
chickens were placed daily on a vibrating plate for 20 minutes,
which resulted in stronger bone growth (National Geographic January,
2001 p. 11). Further, in 1994, Dr. Chen and his associates, working
with rabbits, determined that frequencies of 25 and 50 Hz promoted
bone strength by 20%, stimulating both the mechanism and speed of
fracture healing (Chen et al, 'The Effects of Frequency of Mechanical
Vibration on Experimental Fracture Healing'. Chinese Journal of
Surgery, 32 (4), 217-219, 1994).
There's
even a popular saying amongst veterinarians, "If you put a cat and
a bunch of broken bones in the same room, the bones will heal."
There
is also substantial documentation that low frequency vibration induces
pain relief and healing of tendons and muscles, and cats purr at
those very same frequencies.
Remediation
of other illnesses due to the cat's purring ability is also being
put forward. For example, respiratory problems associated with heart
disease in cats are almost non-existent. In fact, respiratory problems
resolve quickly once purring is activated. Dr. T. F. Cook in 1973
wrote the article 'The Relief of Dyspnea In Cats By Purring' in
the New Zealand Veterinary Journal (dyspnea is the condition of
difficulty in breathing). It seems a dying cat had such difficulty
breathing that the vets were considering euthanasia. But the cat
was found to begin breathing normally once it began to purr! The
purring appeared to open up the cat's air passages. Domestic cats
are generally less prone to postoperative complications following
surgeries. Other healing mechanisms associated with purring include
large skin-tissue grafts that take quickly in cats without necrotizing.
The list just continues on and on.
In
effect then, by changing the frequency of their purring, cats may
be fine-tuning their healing abilities, and it is this unique healing
advantage that has probably given rise to the notion of cats having
nine lives. They survive conditions that normally kill other animals,
such as falls from heights. In a study of 132 cat falls with an
average fall height of 5 stories, 90% survived. The record height
for a cat falling and surviving is 45 stories! Muggenthaler concludes
that such "an internal healing mechanism would be advantageous,
increasing recovery time and keeping muscles and bone strong when
sedentary."
Vibrational Purr Therapy?
The extrapolation
of this research may prove vital. Studies continue regarding tissue
exposure to frequencies between 20-50 Hz. For example, Dr. Clinton
Rubin in a 1999 study discovered that such exposure creates the
robust striations of increased bone density, suggesting applications
for osteoporosis, particularly in post-menopausal women and the
elderly.
Ukrainian
and Russian researchers discovered the benefits of using vibratory
stimulation many decades ago and have employed these techniques
in sports training and sports medicine. Since the fall of the Iron
Curtain, many of the treatment devices used by the Soviets have
made their way into Western gyms and physical therapy treatment
centers. Even the space program has found a benefit from the research.
This breakthrough could help astronauts, who generally lose bone
density in zero gravity, in maintaining healthy bones and resisting
the problems of atrophy in outer space.
But
it's the cat's "healing by association" that most people find interesting:
that ability of a cat to sympathetically help cure illnesses in
people simply by being around them. Studies have also shown that
owners, especially senior citizens, who have cats have lower blood
pressure and can live longer than humans who don't own pets. Many
individuals swear they can ease or completely eliminate their migraine
headaches simply by lying down with a purring cat next to their
head. Can't hit that minimum recommended daily dose of bone-enriching
calcium? Maybe grabbing the nearest cat and holding it close may
just prove to be the answer to brittle-bones. Having
surgery? Perhaps after coming home, keeping a cat nearby will reduce
your recovery time.
So,
go get a cat. Keep it happy and purring. You're both likely to be
healthier and you'll have a great friend who truly understands how
you're feeling.
Lev
G. Fedyniak, MD began his medical career in alternative medicine,
studying acupuncture, herbs and other healing traditions in China,
Hong Kong, Canada, Ukraine and other parts of the world. Recognizing
that the allopathic tradition was a necessary component in treating
illness, he trained in allopathic medicine to obtain the Doctor
of Medicine (MD) degree. Dr. Lev makes his home in Ukraine and continues
to study new approaches to treating illness and optimizing health
from traditions all over the world. He publishes articles and books
in the hopes of bringing such information to all who need it. He
can be reached at DrLev@IntegrativeMedicineOnline.com
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